The Center for National Security Studies, a D.C.-based group which advocates for individual liberties and government transparency, asked the U.S. Court of Appeals for the D.C. Circuit Friday to allow the group time to argue that U.S. District Court Judge Richard Leon's ruling that the counterterrorism program appeared to be illegal was correct, albeit on different grounds than Leon identified.

Leon found the program likely unconstitutional as a violation of Fourth Amendment protections against unreasonable searches and seizures. However, CNSS and other advocates have argued that Leon never should have reached the constitutional issues because the NSA's bulk telephone metadata program was never authorized by Congress.

Government lawyers and numerous judges from the Foreign Intelligence Surveillance Court have concluded that the Section 215 of the Patriot Act creates a legal basis for the program, but that depends on the debatable notion that all U.S. telephone data are "relevant" to future terrorism investigations. Critics of that rationale say it would allow the government to collect virtually any type of data because it could become useful in the future.

CNSS's motion filed Friday asks for 10 minutes of argument time on Nov. 4, when the D.C. Circuit takes up the government's appeal of Leon's ruling as well as several related appeals. The motion (posted here) says both the Justice Department and the conservative legal activist who brought the underlying lawsuits, Larry Klayman, are opposing the request for extra time.

Last week, two other organizations?—the American Civil Liberties Union and the Electronic Frontier Foundation—asked together to join in the arguments on Klayman's case. The government and Klayman did not oppose that motion.

Some opponents of the NSA surveillance program are clearly nervous about leaving the arguments against the program solely to Klayman, a longtime conservative activist known as a rhetorical bombthrower. In an online commentary last week, Klayman called for the U.S. military to use tactical nuclear weapons against the Islamic State militant group. However, he predicted that President Barack Obama will not do so because he "simply has no stomach for killing his creed en masse."

The D.C. Circuit has not yet ruled on either of the motions to join in next month's arguments.